Sizes:                        Max thickness in finished leather:
 

  8/12 sqft                   0.7/0.8mm and some 0.8/0.9mm 

12/16 sqft                   0.8/0.9mm and some 0.9/1.0mm

16/20 sqft                   0.9/1.0mm and some 1.0/1.1mm
 
20/28 sqft                  1.1mm plus
 


Selection 8/12sf; 12/16sf; 16/20sf

Extra = (100% Top grade selected by buyer)
 
TR1 = (80% First + 20% seconds)
 
TR2 = (60% First + 30 % seconds + 10% thirds)
 
TR3 = (40% First +40% seconds + 20% thirds)
 
TR4 = (100% Fourth)
 
 
Selection 20/28sf
 
Extra

A/B/C - 30/40/30

D - 100